Set up a backup schedule request if we have deferred requests.

chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc

Index: chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc
diff --git a/chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc b/chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc
index 4e05ea2ec2549b46d013f1122c56753959902d8c..dd7bd0faf52f3f44ea4d2b38e749acae39cde643 100644
--- a/chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc
+++ b/chrome/browser/ui/webui/offline/offline_internals_ui_message_handler.cc
@@ -288,7 +288,7 @@ void OfflineInternalsUIMessageHandler::HandleAddToRequestQueue(
                 GURL(url), offline_pages::ClientId(
                                offline_pages::kAsyncNamespace, id_stream.str()),
                 true, offline_pages::RequestCoordinator::RequestAvailability::
-                          ENABLED_FOR_OFFLINER) > 0));
+                          ENABLED_FOR_OFFLINER) != 0));

[Dmitry Titov, 2016/10/10 17:29:45]

I think ">" is even "stronger" condition here, why is it important to check for
"!="?

[Pete Williamson, 2016/10/10 19:45:17]

SavePageLater now returns a request_id.  The request id is an integer instead of
a uint, a randomly generated request id could be negative.

If desired, in another changelist, we could change it to uint everywhere, but
that will be a big change in both offline_page_model and request_coordinator, so
we should do it separately.

[Pete Williamson, 2016/10/10 22:53:12]

Done.  Ah, I didn't realize the random number generator promised to give us
positive numbers.

   } else {
     ResolveJavascriptCallback(*callback_id, base::FundamentalValue(false));
   }